Python 3 support

[ericfrederich]

There isn't much Python code in this repo at all, just demos really. The interface is written in Cython which emits code that works with Python 2 or 3.

Because of this, it is trivial to support both 2 and 3 from the same code base.

Just some changes to print statements within the demos, and a simple bytes/strings conversion on the bopt parameters.

[ericfrederich]

Any word on this? I'd like to see it merged if possible. If there is an issue let me know, I'd be happy to accommodate.

[rmcantin]

Thanks Eric. I'll check this, as soon as possible.

Have you tested it in Python 2? I believe print(a,b) -that is, two or more things with a comma- is broken in Python 2.

[ericfrederich]

@rmcantin , This gets interpreted differently between Py2 and Py3 but does not break anything.

• In Python3 this is the print function with two arguments to that function
• In Python2 this is the print statement followed by a tuple of length 2 (even if there is no space between the print and the tuple)

See... they both work fine but get interpreted a bit differently.

$ python3 -c "print(1, 'two')"
1 two
$ python2 -c "print(1, 'two')"
(1, 'two')

If you want the exact same behavior on 2 and 3 you can import print_function from __future__. Though I think this is overkill. The printout is just part of the installation process.

$ python2 -c "from __future__ import print_function; print(1, 'two')"
1 two
$ python3 -c "from __future__ import print_function; print(1, 'two')"
1 two